Just added a couple of things to the coach and thought I would post results.

Installed a Wilson Engineering WeBoost cell signal amplifier. Worth the money. Where we are here in upstate New York for the summer we have 1 bar of cell service, maybe. Forget 4G LTE, we might get 3G and slow. Put the WeBoost in yesterday, mounted the antenna and routed everything, Turgenev it in and waited. We now have a solid 2 bars, sometimes 3 and reliable 3G and sometimes 4g LTE. Very noticeable improvement especially in not dropping calls. Bottom line - pricey but worth the money if you're fulltime and need to stay connected.

Also put ina Alfa CampPro wifi amplifier. This thing works ! Park wifi is pretty good but was spotty where our site is. Now, everything in coach is working like it was back in a sticks and bricks as far as speed . Very happy with it.

I got both of the above from TechnoRV.com. The Alfa is available about $25 cheaper elsewhere but if you get it from them you also get a very well done video and hard copy on how to set it up and install it. Well worth the dollars as the instructions that come with the unit leave a lot to be desired and would entail quite a bit of time and frustration to set it up.

Hope this helps.

Vaughan, so the first one boosts your cell service? Wondering if it would work on my Verizon mifi.

Brad - short answer is yes. The WeBoost is a cell signal amplifier and booster. Our MIFI went from 1 bar and "iffy" 3G-4G to 2-3 bars and pretty decent 4G after the booster was installed and powered up.
The area we are in varies on our phones from No Service to 1 bar of signal strength.